R help - Oct 2010 - Help its urgent

Hi I am student of Masters and wanted to know if you can help with a problem I
have.  I have an array of 100 * 13 and need to extract all values of that array
that are less than a value p = x, insert this code data = c (dat [, 1]> =
p1), but only and managed to tell me if is false or true that the data in
"column 1" of Table "dat" is greater than p1 and what I need
is to extract the values from the table.
urgent 		 	   		  
	[[alternative HTML version deleted]]

Hi Josue,

This should help, you are almost there.

# consider this
dat <- c(1, 2)
# passing TRUE/FALSE to the extraction function
dat[c(TRUE, FALSE)]

# Now moving to an array
# Create an array with dimensions 100, 13 filled with random normal numbers
dat <- array(data = rnorm(100*13), dim = c(100, 13))
# Now apply the principle above to the array
# the logical test returns TRUE/FALSE, which is used to select from column 1
dat[ ,1][dat[ ,1] < 0]

# for the entire dataset
dat[dat < 0]

Cheers,

Josh

On Fri, Oct 1, 2010 at 5:52 PM, Josue Nu?ez Rico <josue_n_r at
hotmail.com> wrote:
>
> Hi I am student of Masters and wanted to know if you can help with a
problem I have. ?I have an array of 100 * 13 and need to extract all values of
that array that are less than a value p = x, insert this code data = c (dat [,
1]> = p1), but only and managed to tell me if is false or true that the data
in "column 1" of Table "dat" is greater than p1 and what I
need is to extract the values from the table.
> urgent
> ? ? ? ?[[alternative HTML version deleted]]
>
> ______________________________________________
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> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>


-- 
Joshua Wiley
Ph.D. Student, Health Psychology
University of California, Los Angeles
http://www.joshuawiley.com/